Alpine 160 rp23 leaking air / what pressure do you run....

So I've recently built an Alpine 160 and am loving the bike. It's second hand so you're never quite sure what you've got. My only concern is the rp23. I've been running 250psi in the shock which seems ok but I'm running into a couple of issues;

1. The shock won't hold the 250psi. I pumped it up just before a blast round llandegla today and by the time I got back it was on 225psi. When I leave it for a few days it seems to settle on 200psi. Any thoughts?

2. I'm not sure 250psi is enough. However it's hard to know as I'm not sure the air stays in long enough to check the sag. What pressure do you run in yours? Can you run the rp23 boost valve with 275psi?

I guess the leaky shock could be remedied by a seal replacement which I can do. Are there any other reasons a shock could be leaking?

Any thoughts would be welcome...other than suggestions on weight loss!?

Not certain on this but im sure there is no air on that side of shock unless it is in neg pressure ie stuck down.
Check its not stuck down and take aircan off,clean o ring and plastic rings on shaft and grease them see if that works

drunkenmonkey...going back to the air pressure loss. When you connect a shock pump, a portion of the high pres. air in the can has to fill the pump tube and the part of the gauge to register a pressure. Baring in mind, the shock hasn't got a huge volume of very high pres. air to start with. It is normal to see a 20-30 psi loss when connecting a pump.

Thanks for all the input, it's all welcome, and I would love to swap it for a coil but just can't justify it! I've done an aircan service and the shock has been perfect since. I've been thrashed in the alps the last few days with the whiteroom and it's been heaven... thanks for the advice.